共查询到20条相似文献，搜索用时 812 毫秒
1.
为评价含碘、季铵盐、过硫酸氢钾、二氧化氯这四类常用消毒剂对非洲猪瘟病毒（ASFV）的灭活效果,参考OIE参考实验室相关操作流程,基于畜禽栏舍、运载工具、器具消毒及皮肤黏膜消毒目的,根据说明书标明的浓度范围选择不同工作浓度,与ASFV分别在4 ℃和20 ℃条件下作用30分钟,10倍连续稀释后接种猪肺泡巨噬细胞,同时加入猪红细胞,培养观察红细胞吸附现象。结果显示,本试验四类消毒剂对ASFV均有灭活作用,但灭活效果因消毒剂的种类和工作浓度不同有所差异。相同工作浓度的同一消毒剂产品,在4 ℃和20 ℃这两种条件下的灭活效果基本一致。季铵盐类和二氧化氯类消毒剂,在说明书推荐的工作浓度下,均有效灭活ASFV;多数含碘类、过硫酸氢钾类消毒剂,需在其说明书标明浓度范围的较高工作浓度时,才可有效杀灭ASFV。本研究为非洲猪瘟防控工作中消毒剂的选择和使用提供参考。 相似文献
2.
《中国预防兽医学报》2021,(9)
为评估抗低温消毒剂"抗冻消-30"对非洲猪瘟病毒(ASFV)的杀灭效果,本研究通过观察不同稀释度的"抗冻消-30"对细胞形态的影响,并计算相应细胞的活性确定该消毒剂对细胞的安全浓度。结果显示,"抗冻消-30"对细胞的安全浓度为≤1 g/L,细胞存活率高于95%,且形态正常。将不同浓度的ASFV报告病毒(rASFV-HLJ/2018-EGFP株)与不同浓度"抗冻消-30"在不同温度下作用30 min后,分别感染HEK293T细胞,通过倒置荧光显微镜观察,评估在不同温度下"抗冻消-30"对ASFV报告病毒的杀灭效果;将不同浓度的ASFV亲本病毒(HLJ/2018株)与不同浓度"抗冻消-30"在-30℃作用30 min后,分别感染猪肺泡巨噬细胞(PAMs),一定时间后加入猪红细胞,利用倒置显微镜观察红细胞吸附现象,评估-30℃条件下,"抗冻消-30"对ASFV亲本病毒的杀灭效果。结果显示,常温和4℃时,400 g/L、160 g/L、80 g/L、40 g/L、8 g/L的"抗冻消-30"可完全杀灭10~6TCID_(50)及以下浓度、10~5TCID_(50)及以下浓度、110~4TCID_(50)及以下浓度、10~4TCID_(50)及以下浓度、10~3TCID_(50)及以下浓度的ASFV报告病毒;-20℃时,上述浓度的"抗冻消-30"可完全杀灭10~5TCID_(50)及以下浓度、110~4TCID_(50)及以下浓度、10~3TCID_(50)及以下浓度、10~3TCID_(50)及以下浓度、10~2TCID_(50) ASFV报告病毒;-30℃和-40℃时,上述浓度的"抗冻消-30"可完全杀灭110~4TCID_(50)及以下浓度、10~3TCID_(50)及以下浓度、10~3TCID_(50)及以下浓度、10~2TCID_(50)及以下浓度、10~2TCID_(50) ASFV报告病毒。-30℃时,400 g/L、160 g/L、80 g/L、40 g/L的"抗冻消-30"可完全杀灭110~4TCID_(50)及以下浓度、10~3TCID_(50)及以下浓度、10~3TCID_(50)及以下浓度、10~2TCID_(50)及以下浓度的ASFV亲本病毒。本研究在细胞水平上系统评价了该消毒剂对ASFV报告病毒和亲本病毒的杀灭情况,表明"抗冻消-30"在常温和低温条件下对ASFV均具有良好的杀灭效果,可以作为防控ASF的有效消毒剂。 相似文献
3.
非洲猪瘟病毒实时荧光定量PCR检测方法的建立及应用 总被引：4，自引：1，他引：3
本研究为了建立一套检测非洲猪瘟病毒(African swine fever virus,ASFV)的实时荧光定量PCR检测方法,根据GenBank公布的23株编码ASFV结构蛋白p72的基因序列,设计引物和探针,优化退火温度、Mg2＋浓度和引物、探针浓度,生成标准曲线,进行重复性、敏感性、特异性试验,并检测样品。结果显示,优化的退火温度为60 ℃,Mg2＋终浓度为4 mmol/L,引物、探针终浓度分别为0.8、0.3 μmol/L。重复性试验变异系数均小于1.3%,敏感性试验最低能够检测到10拷贝/μL的质粒,以其他5种猪病病毒和ASFV质粒为模板进行特异性试验,只有ASFV质粒出现扩增曲线。结果表明,建立的实时荧光定量PCR方法是快速、灵敏、特异的检测ASFV的方法。 相似文献
4.
为探究常见消毒剂对非洲猪瘟病毒(ASFV)的灭活效果,本试验于体外检测了10种市售消毒剂对生长在猪肺泡巨噬细胞中ASFV的灭活效果。进而用3种消毒剂对曾经暴发非洲猪瘟(ASF)的废弃猪场进行环境消毒,并用荧光定量PCR方法验证其可靠性。结果显示,在各消毒剂对细胞的安全浓度下,次氯酸不具有灭活ASFV的作用;过硫酸氢钾复合物作1∶200稀释后,作用0.5 h能完全灭活ASFV;二氯异氰脲酸钠粉和苯扎溴铵稀释800倍后,能在0.5 h内有效灭活ASFV;其他消毒剂在其安全稀释度的浓度下,0.5 h内能完全灭活ASFV。本试验可为养殖场防控ASFV的感染提供消毒剂筛选的参考依据。 相似文献
5.
《广东畜牧兽医科技》2021,46(3)
生物安全仍是当前防控非洲猪瘟的最重要措施。然而,在猪场的各个生物安全环节中,对员工食材的消毒尚未见较好的方法。臭氧消毒是多场景中均可使用的消毒方式。因此,为了探究臭氧溶于水后对非洲猪瘟病毒(ASFV)的杀灭效果,试验通过臭氧水与ASFV的作用后的红细胞吸附(HAD)试验来判定臭氧水对ASFV的杀灭效果。试验结果显示:10 m L浓度为2.0 ppm、3.5 ppm、5.0 ppm的臭氧水与100μL的3.0×104拷贝数的ASFV作用2 min、5 min和10 min时,HAD结果均为阴性,表明2.0 ppm、3.5 ppm、5.0 ppm的臭氧水作用于100μL的3.0×104拷贝数的ASFV 2 min、5 min和10 min时,均可完全杀灭病毒。以上试验表明,臭氧水在不同作用时间下对ASFV具有较好的杀灭效果。 相似文献
6.
本研究旨在探讨非洲猪瘟病毒（ASFV）对猪红细胞（RBCs）的作用以及对猪外周血单核细胞（PBMs）吞噬能力的影响。试验采用流式细胞术检测ASFV侵染猪原代肺泡巨噬细胞（PAMs）和猪红细胞（RBCs）的能力,并检测ASFV诱导RBCs发生凋亡的百分比;同时采用激光共聚焦试验（Confocal）观察ASFV诱导RBCs发生凋亡是否影响PBMs的吞噬能力。结果显示,ASFV不能入侵RBCs,但以时间和剂量依赖性方式诱导RBCs发生凋亡。0.1 MOI ASFV接种RBCs后1、3、5和7 d可分别诱导1.27%、3.23%、7.39%和8.56%的RBCs发生凋亡;1 MOI ASFV接种RBCs后1、3、5和7 d可分别诱导1.54%、3.73%、8.46%和10.74%的RBCs发生凋亡;3 MOI ASFV接种RBCs后1、3、5和7 d可分别诱导2.65%、5.01%、12.44%和18.61%的RBCs发生凋亡。同时,凋亡的RBCs可以增加PBMs对黄绿色荧光微球的吞噬数量,ASFV诱导RBCs凋亡的百分比越高,PBMs吞噬黄绿色荧光微球的数量越多。综上所述,ASFV不能侵染猪RBCs,但可以以时间和剂量依赖性方式诱导RBCs发生凋亡并增强PBMs的吞噬功能。 相似文献
7.
为做好非洲猪瘟（ASF）防控，保障猪场生物安全措施的有效实施，通过查阅文献分析了多种猪场常见消毒药（火碱、酸、过硫酸氢钾、卤素类和醛类）的特点及使用方法，综述了其对非洲猪瘟病毒（ASFV）的杀灭效果。结果显示：在22℃时，1.0%和0.5%的火碱溶液可将ASFV杀灭；800倍稀释的二氯异氰尿酸钠溶液可在0.5 h杀灭ASFV;1.0%的柠檬酸能够将ASFV减少4个对数单位以上；3.0%的醋酸以及0.1%、0.5%和1.0%的戊二醛溶液均对ASFV有杀灭效果。综上，推荐火碱（0.5%）或二氯异氰尿酸钠（稀释度1:800）用于环境消毒，戊二醛（0.1%～1.0%）用于带猪消毒。本文通过综述猪场常用消毒药对ASFV的消杀效果，为猪场消毒药的选择和使用提供指导，以助于猪场的ASF防控。 相似文献
8.
以鸡红细胞、兔红细胞、蟾蜍红细胞作为同源与异源研究的试验材料,聚乙二醇作为促融剂,从聚乙二醇不同浓度、融合温度、融合时间三个方面进行单因素探究,以期找到融合率最高的条件.结果表明,蟾蜍同源红细胞融合组的最适条件为聚乙二醇500 mL/L、37℃、10 min,其余组最适条件皆为聚乙二醇500mL/L、37℃、15 min,且通过对数据的分析发现,融合温度与融合时间对细胞融合率的影响远小于聚乙二醇浓度的影响.此外,由于球形的兔红细胞在运动时所受到的阻力明显小于椭球形的鸡红细胞和蟾蜍红细胞,使得兔同源红细胞的融合率及与兔红细胞融合的异源红细胞的融合率比其他组都高,其中兔同源红细胞最高融合率达到39.3％,而蟾蜍红细胞由于体型远大于其余两类红细胞,其融合率也相应较大. 相似文献
9.
为建立可同时鉴别检测非洲猪瘟病毒(ASFV)以及猪圆环病毒2型(PCV2)、3型(PCV3)的三重PCR方法,根据GenBank中登录的ASFV、PCV2、PCV3相关基因保守序列,分别设计合成特异性引物,通过对引物浓度、退火温度、循环数等反应条件进行优化,建立了针对3种病原的三重PCR检测方法,并开展了敏感性、特异性及重复性试验。结果显示:引物最佳终浓度为0.375 pmol/μL,最佳退火温度为61℃,最佳循环数为35;该方法对ASFV、PCV2、PCV3的扩增目的条带分别为873、530和217 bp,对猪细小病毒和伪狂犬病病毒的扩增结果均为阴性;对ASFV、PCV2、PCV3重组质粒标准品的检出下限均为1×104 copies/μL;相同条件下重复性试验获得均匀一致的结果。结果表明,本研究建立的三重PCR检测方法具有特异性强,敏感性及重复性好等优点,可用于ASFV、PCV2和PCV3感染的快速鉴别诊断及流行病学调查。 相似文献
10.
传播非洲猪瘟病毒(African Sween fever Virus,ASFV)的生物媒介可以分为两类:"储存-复制"方式传播ASFV的生物媒介(钝缘软蜱)、机械性携带并传播ASFV的生物媒介(如蚊、蝇);国内关于钝缘软蜱地域分布及其与ASFV间互作关系的研究较少。笔者推测:近期国内由钝缘软蜱传播ASFV的风险较低,但仍需摸清其在国内真实分布情况;猪群环境中鼠、蚊、蝇等机械性生物媒介传播ASFV的风险较大,应进行有效消杀。 相似文献
11.
为评价戊二醛、酚、含碘类等常用消毒剂消毒后对非洲猪瘟病毒荧光定量PCR检测结果的影响,基于畜禽栏舍、运载工具、器具消毒及皮肤黏膜消毒目的,按消毒剂说明书推荐选择不同工作浓度,分别与不同滴度的非洲猪瘟病毒培养物于20℃条件下作用30 min后,采用荧光定量PCR方法检测作用后产物。结果显示,与对应的阳性对照组相比,含氯类(二氯异氰尿酸钠)、过硫酸氢钾类、二氧化氯类消毒剂,消毒后对荧光定量PCR检测结果影响最显著,检测Ct值显著上升或检测不到;戊二醛类、含碘类(主要成分聚维酮碘)消毒剂,核酸降解能力相对较弱,检测Ct值稍有上升;酚类、季铵盐类、含碘类(主要成分碘、磷酸、硫酸)类消毒剂,检测Ct值基本无变化。本研究评价了7类常用消毒剂消毒对非洲猪瘟病毒荧光定量PCR检测结果的影响,可为防控实践中科学、客观评价分析消毒效果提供技术参考。 相似文献
12.
Machimaporn TAESUJI Khate RATTANAMAS Darsaniya PUNYADARSANIYA Thanongsak MAMOM Hoa Thi NGUYEN Sakchai RUENPHET 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(11):1800
Efficacy of African swine fever virus (ASFV) inactivation using five commercially supply compound disinfectants was evaluated under various condition. Virucidal efficacy demonstrated that products A and E could inactivate at 1:800 within 1 min for both temperatures, while products B, C and D inactivated at 1:400. However, product D could inactivate at 1:800 when the exposure time was extended to 30 min and effected only 20°C. In addition, the cytotoxicity demonstrated that products A, B, C, D and E did not significantly affect to cell at 1:51,200, 1:12,800, 1:12,800, 1:25,600 and 1:12,800 dilution, respectively. In conclusion, these disinfectants could inactivate ASFV, however, the application of these products should be performed under safety precautions to prevent cytotoxicity in humans and animals. 相似文献
13.
Shirai J Kanno T Tsuchiya Y Mitsubayashi S Seki R 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2000,62(1):85-92
The effects of three representative disinfectants, chlorine (sodium hypochlorite), iodine (potassium tetraglicine triiodide), and quaternary ammonium compound (didecyldimethylammonium chloride), on several exotic disease viruses were examined. The viruses used were four enveloped viruses (vesicular stomatitis virus, African swine fever virus, equine viral arteritis virus, and porcine reproductive and respiratory syndrome virus) and two non-enveloped viruses (swine vesicular disease virus (SVDV) and African horse sickness virus (AHSV)). Chlorine was effective against all viruses except SVDV at concentrations of 0.03% to 0.0075%, and a dose response was observed. Iodine was very effective against all viruses at concentrations of 0.015% to 0.0075%, but a dose response was not observed. Quaternary ammonium compound was very effective in low concentration of 0.003% against four enveloped viruses and AHSV, but it was only effective against SVDV with 0.05% NaOH. Electron microscopic observation revealed the probable mechanism of each disinfectant. Chlorine caused complete degeneration of the viral particles and also destroyed the nucleic acid of the viruses. Iodine destroyed mainly the inner components including nucleic acid of the viruses. Quaternary ammonium compound induced detachment of the envelope of the enveloped viruses and formation of micelle in non-enveloped viruses. According to these results, chlorine and iodine disinfectants were quite effective against most of the viruses used at adequately high concentration. The effective concentration of quaternary ammonium compound was the lowest among the disinfectants examined. 相似文献
14.
为了研究家禽粪便环境对常用化学消毒剂杀灭H5N6亚型禽流感病毒的影响,依照《消毒技术规范》,评估5种消毒剂在粪便环境下对目前我国流行的H5N6亚型高致病性禽流感病毒的杀灭效果。结果:与无粪便环境组相比,家禽粪便对5种消毒剂的消毒效果均造成一定程度的影响,需要提高消毒剂工作浓度。其中:过硫酸氢钾复合物溶液、二氯异氰脲酸钠溶液、戊二醛苯扎溴铵溶液作用浓度需分别提高2.5倍、2倍和4倍(均在说明书最大推荐浓度范围内),方可完全灭活H5N6亚型禽流感病毒。尽管癸甲溴铵溶液与戊二醛癸甲溴铵溶液作用浓度分别需提高8倍和4倍可完全杀灭病毒,但均超出了说明书最大推荐浓度,具有一定的使用风险。本研究对指导养禽场和活禽交易市场在粪便环境下科学合理地使用消毒剂杀灭禽流感病毒提供了参考。 相似文献
15.
16.
HADENG Chu-riya FAN Xiao-xu ZHAO Yong-gang WANG Shu-juan ZHANG Zhi-cheng GE Sheng-qiang LI Lin WU Xiao-dong WANG Zhi-liang 《中国畜牧兽医》2017,44(11):3270-3277
African swine fever (ASF), which caused by African swine fever virus (ASFV), is an acute, highly contagious disease characterized by high fever. It leads to serious economic losses in pig industry. 3 assemblies of primers and probes targeting were designed to amplify ASFV B646L (p72) gene using recombinase polymerase amplification (RPA) technology. The Real-time fluorescent RPA method was established after screening of primers and probes, optimization of reaction conditions, tests of sensitivity, specificity and repeatability. The results showed that the method could detect 10 copies of DNA within 20 min at 39℃. No cross-reaction was found when testing swine fever virus, porcine circovirus type 2, porcine parvovirus, pseudorabies virus. According to the fluorescence intensity from 5.5×106 to 5.5×100 copies/μL at each time point, the coefficient of variation was 0.38% to 28.30%. In conclusion, this method could be used for the qualitative detection of ASFV pathogen, which might provide technical support for the early diagnosis of ASFV infection in China, and was also of great significance for the development of corresponding control measures. 相似文献
17.
非洲猪瘟（African swine fever,ASF）是由非洲猪瘟病毒（African swine fever virus,ASFV）感染引起的一种急性、热性、高度接触性传染病,给养猪业造成了严重的经济损失。本研究利用重组酶聚合酶扩增技术（RPA）,针对ASFV B646L （p72）基因设计了3组引物和探针,并进行筛选、反应条件优化、灵敏性、特异性和重复性试验,建立了实时荧光RPA方法。结果显示,该方法在39℃、20 min内即可检测10个拷贝的DNA分子,且与猪瘟病毒、猪圆环病毒2型、猪细小病毒、猪伪狂犬病病毒均无交叉反应,检测5.5×106至5.5×100拷贝/μL共7个稀释度样品在各时间点的荧光强度,变异系数范围在0.38%~28.30%。该等温、快速扩增方法可用于ASFV的定性检测,为中国ASFV感染的早期诊断提供技术支持,对疫情暴发后相应控制方案的制定具有重要意义。 相似文献
18.
Solutions of ethylenediaminetetraacetic acid (EDTA)-Tris showed synergistic or additive effects on gram-negative bacteria when combined with hatchery disinfectants consisting of phenol and detergent (Magnaphen-100), quaternary ammonium compound (QAC) and glutaraldehyde (Synergize), QAC (BioSentry 904), and hydrogen peroxide. The gram-positive bacteria reacted less favorably, with reaction mixtures showing all three levels of potentiation (synergistie, additive, and antagonistic). Combinations of EDTA-Tris and a commercial glutaraldehyde solution (Glutracide), when mixed with the test organisms, showed mostly antagonistic effects. Solutions of EDTA-Tris decreased the concentration of hatchery disinfectants required for bacterial killing by 75% in those situations in which synergistic potentiation occurred. EDTA-Tris is nontoxic to 12-day-old embryos. Serial passage of the test organisms in solutions of EDTA-Tris did not result in the development of resistant forms. 相似文献
19.
Chae Hong RHEE Soohee KIM Young Eun KANG Bokhee HAN Sang-Ji SEO Young Wook KIM Moon HER Wooseog JEONG 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(2):201
This study evaluated the virucidal efficacy of acidic electrolyzed water (AEW) against African swine fever virus (ASFV) and avian influenza virus (AIV), according to the Animal and Plant Quarantine Agency (APQA) guidelines for efficacy testing of veterinary disinfectants. AEW (pH 5.0–6.5) was prepared using a commercially available “Electrolyzed Water Generator” with a free chlorine concentration (FCC) of 5–140 ppm, and its efficiency in reducing the titer of ASFV and AIV was tested in a suspension under low- and high-level organic soiling. Under low-level organic soiling conditions, AEW with FCC ≥40 ppm was effective against ASFV; under high-level organic soiling conditions, AEW with FCC ≥80 ppm was effective against ASFV. Under low-level organic soiling conditions, AEW with FCC ≥60 ppm was effective against AIV; under high-level organic soiling conditions, AEW with FCC ≥100 ppm was effective against AIV. The virucidal effect of AEW seemed dependent on the FCC and the presence of organic soiling. Based on these data, we recommend the following minimum FCCs in AEW treatment for routine disinfection in veterinary field under low- and high-level organic soiling conditions: for ASFV, 50 ppm and 100 ppm; and for AIV, 75 ppm and 125 ppm, respectively. In conclusion, the virucidal effects of AEW against ASFV and AIV emphasize its potential utility as a disinfectant, and we suggest considering organic soiling conditions while using AEW for implementing effective control measures for field applications. 相似文献
20.
D T Shen T B Crawford J R Gorham T C McGuire 《American journal of veterinary research》1977,38(8):1217-1219
Twelve chemicals and commercial disinfectants were tested for inactivation of equine infectious anemia virus. In the presence of 10% bovine serum, all chemicals inactivated 4 log10 (based on 0.1 ml) of the virus within 5 minutes at 23 C. A reduction of at least 4 log10 was observed when the virus was exposed for 1 minute to substituted phenolic disinfectants (3 commercial preparations and sodium orthophenylphenate), halogen derivatives (iodophor and sodium hypochlorite), chlorhexidine, and 70% ethanol. Sodium hydroxide (5%), 2% formalin, and 2% glutaraldehyde were slower to inactivate the virus, but achieved 4 log10 reduction in titer by 5 minutes' contact time. The susceptibility of the equine infectious anemia virus to chemical disinfectants is similar to that of other enveloped viruses. 相似文献